We use paper ballots with the optical scanner but of course not all states do.
The OP says "If" and that he/she "suspects" they will try to steal the election.
I live in Arizona where there have been problems in my state concerning this election. For instance in Maricopa County, the largest county in AZ, the Spanish-speaking voters wrong election date. And just a few days ago it came out that Jeff Flake's (R) robocalls were going out to registered Democrats giving them the wrong information on where they should go to vote.
And then there is this...
Thousands report voting problems
Source: Houston Chronicle
Thousands report voting problems
Tuesday, November 6, 2012
Long lines arent the only problems voters are facing across the country. Particularly in battleground states, reports of voting problems were flooding into vote-protection groups.
The Election Protection Coalition, comprised of more than 100 local organizations dedicated to protecting the right to vote, reported 53,000 complaint calls by 2 p.m. Eastern time.
Calls to our hotline are spiking, said one official with the Lawyers Committee for Civil Rights under Law, a lead organization in the coalition, ate 2p.m.
Many of the problems were coming from battleground states, including recurrent voting machine breakdowns and malfunctions in traditionally Democratic areas of Ohio including Cleveland, Dayton and Toledo.
Read more: http://blog.chron.com/txpotomac/2012/11/thousands-report-voting-problems/